Looking for a rectangular tart box

I am looking for a box to fit this rectangle tart in for holiday packaging. This is a Gobel tart pan made in France and I cannot seem to find a box to fit it in the U.S. The dimensions would need to be narrow: 5x14x2".

This is such a beautiful, popular shape, I have a hard time believing there is not a box out there to fit but so far I haven't found anything! Only very large boxes 10x14x2